Kawirikawiri, ma disk kapena disk arrays ali ndi ntchito yabwino kwambiri pamtundu umodzi wokha. Makina ambiri ogwiritsira ntchito amatengera mafayilo amafayilo okha, zomwe zikutanthauza kuti fayilo imatha kukhala ndi pulogalamu imodzi yokha. Zotsatira zake, makina onse ogwiritsira ntchito ndi mapulogalamu ogwiritsira ntchito amakwaniritsa kuwerenga ndi kulemba kwa disk yosungirako kutengera mawonekedwe ake. Kukhathamiritsa uku kumafuna kuchepetsa nthawi zofunafuna thupi ndikuchepetsa nthawi yoyankha pamakina a disk. Zopempha za data kuchokera ku pulogalamu iliyonse zimayendetsedwa ndi makina ogwiritsira ntchito, zomwe zimapangitsa kuti deta iwerengedwe bwino ndi kulemba zopempha za disk kapena disk array. Izi zimatsogolera ku magwiridwe antchito abwino kwambiri osungirako pakukhazikitsa uku.
Kwa ma disk arrays, ngakhale chowongolera chowonjezera cha RAID chikuwonjezedwa pakati pa makina ogwiritsira ntchito ndi ma drive a disk, olamulira apano a RAID amayang'anira ndikutsimikizira magwiridwe antchito a disk. Sachita zopempha zophatikiza, kuyitanitsanso, kapena kukhathamiritsa. Owongolera a RAID adapangidwa kutengera lingaliro loti zopempha za data zimachokera kwa wolandila m'modzi, wokongoletsedwa kale ndikusankhidwa ndi makina ogwiritsira ntchito. Cache ya woyang'anira imangopereka mphamvu zachindunji komanso zowerengera, popanda kupanga mizere kuti mukwaniritse bwino. Pamene cache imadzazidwa mwamsanga, liwiro limatsika nthawi yomweyo ku liwiro lenileni la ntchito za disk.
Ntchito yayikulu ya woyang'anira RAID ndikupanga diski imodzi kapena zingapo zazikulu zololera zolakwika kuchokera pama diski angapo ndikuwongolera kuchuluka kwa data yonse yowerengera ndi kulemba mwachangu pogwiritsa ntchito chosungira pa disk iliyonse. Cache yowerengera ya olamulira a RAID imakulitsa kwambiri magwiridwe antchito a disk array pamene deta yomweyi ikuwerengedwa pakanthawi kochepa. Kuthamanga kwenikweni kowerengera ndi kulemba kwa gulu lonse la disk kumakhala kochepa kwambiri ndi mtengo wotsikitsitsa pakati pa bandwidth yolandila, kuwerengera kotsimikizika kwa CPU ndi mphamvu zowongolera dongosolo (injini ya RAID), bandwidth ya disk, ndi disk performance (kuphatikiza kwenikweni kwa ma disks onse). Kuphatikiza apo, kusagwirizana pakati pa kukhathamiritsa kwa zopempha zamakina ogwiritsira ntchito ndi mawonekedwe a RAID, monga kukula kwa block ya zopempha za I/O zosayenderana ndi kukula kwa gawo la RAID, kumatha kukhudza kwambiri magwiridwe antchito a disk.
Kusiyanasiyana kwamachitidwe a Traditional Disk Array Storage Systems mu Multiple Host Access
M'magawo angapo ofikira olandila, magwiridwe antchito a disk arrays amatsika poyerekeza ndi kulumikizana kwa gulu limodzi. M'makina ang'onoang'ono osungiramo ma disks, omwe nthawi zambiri amakhala ndi olamulira a disk array amodzi kapena osagwiritsidwa ntchito ndi chiwerengero chochepa cha ma disks olumikizidwa, ntchitoyo imakhudzidwa ndi kusuntha kwa deta kosayendetsedwa kuchokera ku makamu osiyanasiyana. Izi zimabweretsa kuchulukira kwa nthawi zofufuza za disk, mutu wagawo la data ndi chidziwitso cha mchira, ndi kugawikana kwa data kuti muwerenge, kuphatikiza, kuwerengera zotsimikizira, ndi kulembanso. Chifukwa chake, ntchito yosungirako imachepa ngati olandila ambiri amalumikizidwa.
M'makina akuluakulu osungiramo ma disks, kuwonongeka kwa ntchito kumakhala kosiyana ndi kagawo kakang'ono ka disk. Makina akuluakuluwa amagwiritsa ntchito mabasi kapena njira yosinthira kuti alumikizane ndi magawo angapo osungira (ma disk arrays) ndikuphatikiza ma cache akulu akulu ndi ma module olumikizirana (ofanana ndi ma tchanelo kapena masiwichi) kwa makamu ambiri mkati mwa basi kapena kusintha. kapangidwe. Kuchitako kumadalira kwambiri cache mu ntchito zokonza zinthu koma zimakhala ndi mphamvu zochepa pazochitika za multimedia data. Ngakhale ma disk amkati amkati mwazinthu zazikuluzikuluzi zimagwira ntchito modziyimira pawokha, gawo limodzi lomveka limangomangidwa mkati mwa disk subsystem imodzi. Choncho, ntchito ya unit imodzi yomveka imakhalabe yochepa.
Pomaliza, magulu ang'onoang'ono a disk amakumana ndi kuchepa kwa magwiridwe antchito chifukwa cha kusayenda bwino kwa data, pomwe ma disk akulu akulu okhala ndi ma disks angapo odziyimira pawokha amatha kuthandizira makamu ambiri koma amayang'anizanabe ndi zoletsa pakugwiritsa ntchito ma multimedia data. Kumbali ina, makina osungira a NAS otengera luso lakale la RAID ndikugwiritsa ntchito ma protocol a NFS ndi CIFS kuti agawane zosungirako ndi ogwiritsa ntchito akunja kudzera m'malumikizidwe a Ethernet sakumana ndi kuwonongeka kwa magwiridwe antchito m'malo angapo ofikira alendo. Makina osungira a NAS amathandizira kutumiza kwa data pogwiritsa ntchito kusamutsidwa kofananira kwa TCP/IP, kulola kuthamanga kwambiri kogawana pafupifupi 60 MB/s mu kachipangizo kosungirako ka NAS. Kugwiritsa ntchito maulumikizidwe a Ethernet kumathandizira kuti chidziwitsocho chilembedwe bwino ku disk system pambuyo poyang'anira ndikukonzanso ndi makina ogwiritsira ntchito kapena pulogalamu yoyang'anira deta mu seva yopyapyala. Chifukwa chake, dongosolo la disk palokha silikumana ndi kuwonongeka kwakukulu kwa magwiridwe antchito, kupangitsa kusungirako kwa NAS kukhala koyenera kwa mapulogalamu omwe amafunikira kugawana deta.
Nthawi yotumiza: Jul-17-2023
